一道因式分解 容易的 急用
要过程
解:原式=x^2(x^2-1)-4(x^2-1) =(x^2-1)*(x^2-4) =(x+1)(x-1)(x+2)(x-2)
解:原式=x^2(x^2-1)-4(x^2-1) =(x^2-1)*(x^2-4) =(x^2-1^2)*[x^2-(2^2)] =(x+1)(x-1)(x+2)(x-2)
解:原式=x^2(x^2-1)-4(x^2-1) =(x^2-1)*(x^2-4) =(x+1)(x-1)(x+2)(x-2)
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